Audio/video filters

The particular set of Audio/video filters that you can use can depend on the version of the underlying encoding tools that Transloadit uses for the following Robots:

Transloadit recommends having: ffmpeg_stack: "v7.0.0" in these Robots’ Assembly Instructions. We are intimately aware of how important continuity is for our customers, so stack version upgrades are always opt-in. Stack versions are typically supported for many years before we start issuing deprecation warnings (for example, we had been supporting "v1.0.0" for 11 years before we deprecated it).

Name	Description	Read	Write
`a3dscope`	Convert input audio to 3d scope video output.
`aap`	Apply Affine Projection algorithm to first audio stream.
`abench`	Benchmark part of a filtergraph.
`abitscope`	Convert input audio to audio bit scope video output.
`abuffer`	Buffer audio frames, and make them accessible to the filterchain.
`abuffersink`	Buffer audio frames, and make them available to the end of the filter graph.
`acompressor`	Audio compressor.
`acontrast`	Simple audio dynamic range compression/expansion filter.
`acopy`	Copy the input audio unchanged to the output.
`acrossfade`	Cross fade two input audio streams.
`acrossover`	Split audio into per-bands streams.
`acrusher`	Reduce audio bit resolution.
`acue`	Delay filtering to match a cue.
`addroi`	Add region of interest to frame.
`adeclick`	Remove impulsive noise from input audio.
`adeclip`	Remove clipping from input audio.
`adecorrelate`	Apply decorrelation to input audio.
`adelay`	Delay one or more audio channels.
`adenorm`	Remedy denormals by adding extremely low-level noise.
`aderivative`	Compute derivative of input audio.
`adrawgraph`	Draw a graph using input audio metadata.
`adrc`	Audio Spectral Dynamic Range Controller.
`adynamicequalizer`	Apply Dynamic Equalization of input audio.
`adynamicsmooth`	Apply Dynamic Smoothing of input audio.
`aecho`	Add echoing to the audio.
`aemphasis`	Audio emphasis.
`aeval`	Filter audio signal according to a specified expression.
`aevalsrc`	Generate an audio signal generated by an expression.
`aexciter`	Enhance high frequency part of audio.
`afade`	Fade in/out input audio.
`afdelaysrc`	Generate a Fractional delay FIR coefficients.
`afftdn`	Denoise audio samples using FFT.
`afftfilt`	Apply arbitrary expressions to samples in frequency domain.
`afifo`	Buffer input frames and send them when they are requested.
`afir`	Apply Finite Impulse Response filter with supplied coefficients in additional stream(s).
`afireqsrc`	Generate a FIR equalizer coefficients audio stream.
`afirsrc`	Generate a FIR coefficients audio stream.
`aformat`	Convert the input audio to one of the specified formats.
`afreqshift`	Apply frequency shifting to input audio.
`afwtdn`	Denoise audio stream using Wavelets.
`agate`	Audio gate.
`agraphmonitor`	Show various filtergraph stats.
`ahistogram`	Convert input audio to histogram video output.
`aiir`	Apply Infinite Impulse Response filter with supplied coefficients.
`aintegral`	Compute integral of input audio.
`ainterleave`	Temporally interleave audio inputs.
`alatency`	Report audio filtering latency.
`alimiter`	Audio lookahead limiter.
`allpass`	Apply a two-pole all-pass filter.
`allrgb`	Generate all RGB colors.
`allyuv`	Generate all yuv colors.
`aloop`	Loop audio samples.
`alphaextract`	Extract an alpha channel as a grayscale image component.
`alphamerge`	Copy the luma value of the second input into the alpha channel of the first input.
`amerge`	Merge two or more audio streams into a single multi-channel stream.
`ametadata`	Manipulate audio frame metadata.
`amix`	Audio mixing.
`amovie`	Read audio from a movie source.
`amplify`	Amplify changes between successive video frames.
`amultiply`	Multiply two audio streams.
`anequalizer`	Apply high-order audio parametric multi band equalizer.
`anlmdn`	Reduce broadband noise from stream using Non-Local Means.
`anlmf`	Apply Normalized Least-Mean-Fourth algorithm to first audio stream.
`anlms`	Apply Normalized Least-Mean-Squares algorithm to first audio stream.
`anoisesrc`	Generate a noise audio signal.
`anull`	Pass the source unchanged to the output.
`anullsink`	Do absolutely nothing with the input audio.
`anullsrc`	Null audio source, return empty audio frames.
`apad`	Pad audio with silence.
`aperms`	Set permissions for the output audio frame.
`aphasemeter`	Convert input audio to phase meter video output.
`aphaser`	Add a phasing effect to the audio.
`aphaseshift`	Apply phase shifting to input audio.
`apsnr`	Measure Audio Peak Signal-to-Noise Ratio.
`apsyclip`	Audio Psychoacoustic Clipper.
`apulsator`	Audio pulsator.
`arealtime`	Slow down filtering to match realtime.
`aresample`	Resample audio data.
`areverse`	Reverse an audio clip.
`arls`	Apply Recursive Least Squares algorithm to first audio stream.
`arnndn`	Reduce noise from speech using Recurrent Neural Networks.
`asdr`	Measure Audio Signal-to-Distortion Ratio.
`asegment`	Segment audio stream.
`aselect`	Select audio frames to pass in output.
`asendcmd`	Send commands to filters.
`asetnsamples`	Set the number of samples for each output audio frames.
`asetpts`	Set PTS for the output audio frame.
`asetrate`	Change the sample rate without altering the data.
`asettb`	Set timebase for the audio output link.
`ashowinfo`	Show textual information for each audio frame.
`asidedata`	Manipulate audio frame side data.
`asisdr`	Measure Audio Scale-Invariant Signal-to-Distortion Ratio.
`asoftclip`	Audio Soft Clipper.
`aspectralstats`	Show frequency domain statistics about audio frames.
`asplit`	Pass on the audio input to N audio outputs.
`ass`	Render ASS subtitles onto input video using the libass library.
`astats`	Show time domain statistics about audio frames.
`astreamselect`	Select audio streams
`asubboost`	Boost subwoofer frequencies.
`asubcut`	Cut subwoofer frequencies.
`asupercut`	Cut super frequencies.
`asuperpass`	Apply high order Butterworth band-pass filter.
`asuperstop`	Apply high order Butterworth band-stop filter.
`atadenoise`	Apply an Adaptive Temporal Averaging Denoiser.
`atempo`	Adjust audio tempo.
`atilt`	Apply spectral tilt to audio.
`atrim`	Pick one continuous section from the input, drop the rest.
`avectorscope`	Convert input audio to vectorscope video output.
`avgblur`	Apply Average Blur filter.
`avgblur_opencl`	Apply average blur filter
`avgblur_vulkan`	Apply avgblur mask to input video
`avsynctest`	Generate an Audio Video Sync Test.
`axcorrelate`	Cross-correlate two audio streams.
`azmq`	Receive commands through ZMQ and broker them to filters.
`backgroundkey`	Turns a static background into transparency.
`bandpass`	Apply a two-pole Butterworth band-pass filter.
`bandreject`	Apply a two-pole Butterworth band-reject filter.
`bass`	Boost or cut lower frequencies.
`bbox`	Compute bounding box for each frame.
`bench`	Benchmark part of a filtergraph.
`bilateral`	Apply Bilateral filter.
`bilateral_cuda`	GPU accelerated bilateral filter
`biquad`	Apply a biquad IIR filter with the given coefficients.
`bitplanenoise`	Measure bit plane noise.
`blackdetect`	Detect video intervals that are (almost) black.
`blackframe`	Detect frames that are (almost) black.
`blend`	Blend two video frames into each other.
`blend_vulkan`	Blend two video frames in Vulkan
`blockdetect`	Blockdetect filter.
`blurdetect`	Blurdetect filter.
`bm3d`	Block-Matching 3D denoiser.
`boxblur`	Blur the input.
`boxblur_opencl`	Apply boxblur filter to input video
`bs2b`	Bauer stereo-to-binaural filter.
`buffer`	Buffer video frames, and make them accessible to the filterchain.
`buffersink`	Buffer video frames, and make them available to the end of the filter graph.
`bwdif`	Deinterlace the input image.
`bwdif_cuda`	Deinterlace CUDA frames
`bwdif_vulkan`	Deinterlace Vulkan frames via bwdif
`cas`	Contrast Adaptive Sharpen.
`ccrepack`	Repack CEA-708 closed caption metadata
`cellauto`	Create pattern generated by an elementary cellular automaton.
`channelmap`	Remap audio channels.
`channelsplit`	Split audio into per-channel streams.
`chorus`	Add a chorus effect to the audio.
`chromaber_vulkan`	Offset chroma of input video (chromatic aberration)
`chromahold`	Turns a certain color range into gray.
`chromakey`	Turns a certain color into transparency. Operates on YUV colors.
`chromakey_cuda`	GPU accelerated chromakey filter
`chromanr`	Reduce chrominance noise.
`chromashift`	Shift chroma.
`ciescope`	Video CIE scope.
`codecview`	Visualize information about some codecs.
`color`	Provide an uniformly colored input.
`color_vulkan`	Generate a constant color (Vulkan)
`colorbalance`	Adjust the color balance.
`colorchannelmixer`	Adjust colors by mixing color channels.
`colorchart`	Generate color checker chart.
`colorcontrast`	Adjust color contrast between RGB components.
`colorcorrect`	Adjust color white balance selectively for blacks and whites.
`colorhold`	Turns a certain color range into gray. Operates on RGB colors.
`colorize`	Overlay a solid color on the video stream.
`colorkey`	Turns a certain color into transparency. Operates on RGB colors.
`colorkey_opencl`	Turns a certain color into transparency. Operates on RGB colors.
`colorlevels`	Adjust the color levels.
`colormap`	VVV->V Apply custom Color Maps to video stream.
`colormatrix`	Convert color matrix.
`colorspace`	Convert between colorspaces.
`colorspace_cuda`	CUDA accelerated video color converter
`colorspectrum`	Generate colors spectrum.
`colortemperature`	Adjust color temperature of video.
`compand`	Compress or expand audio dynamic range.
`compensationdelay`	Audio Compensation Delay Line.
`concat`	Concatenate audio and video streams.
`convolution`	Apply convolution filter.
`convolution_opencl`	Apply convolution mask to input video
`convolve`	Convolve first video stream with second video stream.
`copy`	Copy the input video unchanged to the output.
`corr`	Calculate the correlation between two video streams.
`cover_rect`	Find and cover a user specified object.
`crop`	Crop the input video.
`cropdetect`	Auto-detect crop size.
`crossfeed`	Apply headphone crossfeed filter.
`crystalizer`	Simple audio noise sharpening filter.
`cue`	Delay filtering to match a cue.
`curves`	Adjust components curves.
`datascope`	Video data analysis.
`dblur`	Apply Directional Blur filter.
`dcshift`	Apply a DC shift to the audio.
`dctdnoiz`	Denoise frames using 2D DCT.
`deband`	Debands video.
`deblock`	Deblock video.
`decimate`	Decimate frames (post field matching filter).
`deconvolve`	Deconvolve first video stream with second video stream.
`dedot`	Reduce cross-luminance and cross-color.
`deesser`	Apply de-essing to the audio.
`deflate`	Apply deflate effect.
`deflicker`	Remove temporal frame luminance variations.
`deinterlace_qsv`	QuickSync video deinterlacing
`deinterlace_vaapi`	Deinterlacing of VAAPI surfaces
`dejudder`	Remove judder produced by pullup.
`delogo`	Remove logo from input video.
`denoise_vaapi`	VAAPI VPP for de-noise
`derain`	Apply derain filter to the input.
`deshake`	Stabilize shaky video.
`deshake_opencl`	Feature-point based video stabilization filter
`despill`	Despill video.
`detelecine`	Apply an inverse telecine pattern.
`dialoguenhance`	Audio Dialogue Enhancement.
`dilation`	Apply dilation effect.
`dilation_opencl`	Apply dilation effect
`displace`	VVV->V Displace pixels.
`dnn_classify`	Apply DNN classify filter to the input.
`dnn_detect`	Apply DNN detect filter to the input.
`dnn_processing`	Apply DNN processing filter to the input.
`doubleweave`	Weave input video fields into double number of frames.
`drawbox`	Draw a colored box on the input video.
`drawgraph`	Draw a graph using input video metadata.
`drawgrid`	Draw a colored grid on the input video.
`drawtext`	Draw text on top of video frames using libfreetype library.
`drmeter`	Measure audio dynamic range.
`dynaudnorm`	Dynamic Audio Normalizer.
`earwax`	Widen the stereo image.
`ebur128`	EBU R128 scanner.
`edgedetect`	Detect and draw edge.
`elbg`	Apply posterize effect, using the ELBG algorithm.
`entropy`	Measure video frames entropy.
`epx`	Scale the input using EPX algorithm.
`eq`	Adjust brightness, contrast, gamma, and saturation.
`equalizer`	Apply two-pole peaking equalization (EQ) filter.
`erosion`	Apply erosion effect.
`erosion_opencl`	Apply erosion effect
`estdif`	Apply Edge Slope Tracing deinterlace.
`exposure`	Adjust exposure of the video stream.
`extractplanes`	Extract planes as grayscale frames.
`extrastereo`	Increase difference between stereo audio channels.
`fade`	Fade in/out input video.
`feedback`	Apply feedback video filter.
`fftdnoiz`	Denoise frames using 3D FFT.
`fftfilt`	Apply arbitrary expressions to pixels in frequency domain.
`field`	Extract a field from the input video.
`fieldhint`	Field matching using hints.
`fieldmatch`	Field matching for inverse telecine.
`fieldorder`	Set the field order.
`fifo`	Buffer input images and send them when they are requested.
`fillborders`	Fill borders of the input video.
`find_rect`	Find a user specified object.
`firequalizer`	Finite Impulse Response Equalizer.
`flanger`	Apply a flanging effect to the audio.
`flip_vulkan`	Flip both horizontally and vertically
`flite`	Synthesize voice from text using libflite.
`floodfill`	Fill area with same color with another color.
`format`	Convert the input video to one of the specified pixel formats.
`fps`	Force constant framerate.
`framepack`	Generate a frame packed stereoscopic video.
`framerate`	Upsamples or downsamples progressive source between specified frame rates.
`framestep`	Select one frame every N frames.
`freezedetect`	Detects frozen video input.
`freezeframes`	Freeze video frames.
`frei0r`	Apply a frei0r effect.
`frei0r_src`	Generate a frei0r source.
`fspp`	Apply Fast Simple Post-processing filter.
`fsync`	Synchronize video frames from external source.
`gblur`	Apply Gaussian Blur filter.
`gblur_vulkan`	Gaussian Blur in Vulkan
`geq`	Apply generic equation to each pixel.
`gradfun`	Debands video quickly using gradients.
`gradients`	Draw a gradients.
`graphmonitor`	Show various filtergraph stats.
`grayworld`	Adjust white balance using LAB gray world algorithm
`greyedge`	Estimates scene illumination by grey edge assumption.
`guided`	Apply Guided filter.
`haas`	Apply Haas Stereo Enhancer.
`haldclut`	Adjust colors using a Hald CLUT.
`haldclutsrc`	Provide an identity Hald CLUT.
`hdcd`	Apply High Definition Compatible Digital (HDCD) decoding.
`headphone`	Apply headphone binaural spatialization with HRTFs in additional streams.
`hflip`	Horizontally flip the input video.
`hflip_vulkan`	Horizontally flip the input video in Vulkan
`highpass`	Apply a high-pass filter with 3dB point frequency.
`highshelf`	Apply a high shelf filter.
`hilbert`	Generate a Hilbert transform FIR coefficients.
`histeq`	Apply global color histogram equalization.
`histogram`	Compute and draw a histogram.
`hqdn3d`	Apply a High Quality 3D Denoiser.
`hqx`	Scale the input by 2, 3 or 4 using the hq*x magnification algorithm.
`hstack`	Stack video inputs horizontally.
`hstack_qsv`	"Quick Sync Video" hstack
`hstack_vaapi`	"VA-API" hstack
`hsvhold`	Turns a certain HSV range into gray.
`hsvkey`	Turns a certain HSV range into transparency. Operates on YUV colors.
`hue`	Adjust the hue and saturation of the input video.
`huesaturation`	Apply hue-saturation-intensity adjustments.
`hwdownload`	Download a hardware frame to a normal frame
`hwmap`	Map hardware frames
`hwupload`	Upload a normal frame to a hardware frame
`hwupload_cuda`	Upload a system memory frame to a CUDA device.
`hysteresis`	Grow first stream into second stream by connecting components.
`identity`	Calculate the Identity between two video streams.
`idet`	Interlace detect Filter.
`il`	Deinterleave or interleave fields.
`inflate`	Apply inflate effect.
`interlace`	Convert progressive video into interlaced.
`interleave`	Temporally interleave video inputs.
`join`	Join multiple audio streams into multi-channel output.
`kerndeint`	Apply kernel deinterlacing to the input.
`kirsch`	Apply kirsch operator.
`ladspa`	Apply LADSPA effect.
`lagfun`	Slowly update darker pixels.
`latency`	Report video filtering latency.
`lenscorrection`	Rectify the image by correcting for lens distortion.
`libplacebo`	Apply various GPU filters from libplacebo
`libvmaf`	Calculate the VMAF between two video streams.
`life`	Create life.
`limitdiff`	Apply filtering with limiting difference.
`limiter`	Limit pixels components to the specified range.
`loop`	Loop video frames.
`loudnorm`	EBU R128 loudness normalization
`lowpass`	Apply a low-pass filter with 3dB point frequency.
`lowshelf`	Apply a low shelf filter.
`lumakey`	Turns a certain luma into transparency.
`lut`	Compute and apply a lookup table to the RGB/YUV input video.
`lut1d`	Adjust colors using a 1D LUT.
`lut2`	Compute and apply a lookup table from two video inputs.
`lut3d`	Adjust colors using a 3D LUT.
`lutrgb`	Compute and apply a lookup table to the RGB input video.
`lutyuv`	Compute and apply a lookup table to the YUV input video.
`mandelbrot`	Render a Mandelbrot fractal.
`maskedclamp`	VVV->V Clamp first stream with second stream and third stream.
`maskedmax`	VVV->V Apply filtering with maximum difference of two streams.
`maskedmerge`	VVV->V Merge first stream with second stream using third stream as mask.
`maskedmin`	VVV->V Apply filtering with minimum difference of two streams.
`maskedthreshold`	Pick pixels comparing absolute difference of two streams with threshold.
`maskfun`	Create Mask.
`mcdeint`	Apply motion compensating deinterlacing.
`mcompand`	Multiband Compress or expand audio dynamic range.
`median`	Apply Median filter.
`mergeplanes`	Merge planes.
`mestimate`	Generate motion vectors.
`metadata`	Manipulate video frame metadata.
`midequalizer`	Apply Midway Equalization.
`minterpolate`	Frame rate conversion using Motion Interpolation.
`mix`	Mix video inputs.
`monochrome`	Convert video to gray using custom color filter.
`morpho`	Apply Morphological filter.
`movie`	Read from a movie source.
`mpdecimate`	Remove near-duplicate frames.
`mptestsrc`	Generate various test pattern.
`msad`	Calculate the MSAD between two video streams.
`multiply`	Multiply first video stream with second video stream.
`negate`	Negate input video.
`nlmeans`	Non-local means denoiser.
`nlmeans_opencl`	Non-local means denoiser through OpenCL
`nlmeans_vulkan`	Non-local means denoiser (Vulkan)
`nnedi`	Apply neural network edge directed interpolation intra-only deinterlacer.
`noformat`	Force libavfilter not to use any of the specified pixel formats for the input to the next filter.
`noise`	Add noise.
`normalize`	Normalize RGB video.
`null`	Pass the source unchanged to the output.
`nullsink`	Do absolutely nothing with the input video.
`nullsrc`	Null video source, return unprocessed video frames.
`openclsrc`	Generate video using an OpenCL program
`oscilloscope`	2D Video Oscilloscope.
`overlay`	Overlay a video source on top of the input.
`overlay_cuda`	Overlay one video on top of another using CUDA
`overlay_opencl`	Overlay one video on top of another
`overlay_qsv`	Quick Sync Video overlay.
`overlay_vaapi`	Overlay one video on top of another
`overlay_vulkan`	Overlay a source on top of another
`owdenoise`	Denoise using wavelets.
`pad`	Pad the input video.
`pad_opencl`	Pad the input video.
`pal100bars`	Generate PAL 100% color bars.
`pal75bars`	Generate PAL 75% color bars.
`palettegen`	Find the optimal palette for a given stream.
`paletteuse`	Use a palette to downsample an input video stream.
`pan`	Remix channels with coefficients (panning).
`perms`	Set permissions for the output video frame.
`perspective`	Correct the perspective of video.
`phase`	Phase shift fields.
`photosensitivity`	Filter out photosensitive epilepsy seizure-inducing flashes.
`pixdesctest`	Test pixel format definitions.
`pixelize`	Pixelize video.
`pixscope`	Pixel data analysis.
`pp`	Filter video using libpostproc.
`pp7`	Apply Postprocessing 7 filter.
`premultiply`	PreMultiply first stream with first plane of second stream.
`prewitt`	Apply prewitt operator.
`prewitt_opencl`	Apply prewitt operator
`procamp_vaapi`	ProcAmp (color balance) adjustments for hue, saturation, brightness, contrast
`program_opencl`	Filter video using an OpenCL program
`pseudocolor`	Make pseudocolored video frames.
`psnr`	Calculate the PSNR between two video streams.
`pullup`	Pullup from field sequence to frames.
`qp`	Change video quantization parameters.
`qrencode`	Draw a QR code on top of video frames.
`qrencodesrc`	Generate a QR code.
`quirc`	Decode and show QR codes content.
`random`	Return random frames.
`readeia608`	Read EIA-608 Closed Caption codes from input video and write them to frame metadata.
`readvitc`	Read vertical interval timecode and write it to frame metadata.
`realtime`	Slow down filtering to match realtime.
`remap`	VVV->V Remap pixels.
`remap_opencl`	VVV->V Remap pixels using OpenCL.
`removegrain`	Remove grain.
`removelogo`	Remove a TV logo based on a mask image.
`repeatfields`	Hard repeat fields based on MPEG repeat field flag.
`replaygain`	ReplayGain scanner.
`reverse`	Reverse a clip.
`rgbashift`	Shift RGBA.
`rgbtestsrc`	Generate RGB test pattern.
`roberts`	Apply roberts cross operator.
`roberts_opencl`	Apply roberts operator
`rotate`	Rotate the input image.
`sab`	Apply shape adaptive blur.
`scale`	Scale the input video size and/or convert the image format.
`scale2ref`	Scale the input video size and/or convert the image format to the given reference.
`scale_cuda`	GPU accelerated video resizer
`scale_qsv`	QuickSync video scaling and format conversion
`scale_vaapi`	Scale to/from VAAPI surfaces.
`scale_vulkan`	Scale Vulkan frames
`scdet`	Detect video scene change
`scharr`	Apply scharr operator.
`scroll`	Scroll input video.
`segment`	Segment video stream.
`select`	Select video frames to pass in output.
`selectivecolor`	Apply CMYK adjustments to specific color ranges.
`sendcmd`	Send commands to filters.
`separatefields`	Split input video frames into fields.
`setdar`	Set the frame display aspect ratio.
`setfield`	Force field for the output video frame.
`setparams`	Force field, or color property for the output video frame.
`setpts`	Set PTS for the output video frame.
`setrange`	Force color range for the output video frame.
`setsar`	Set the pixel sample aspect ratio.
`settb`	Set timebase for the video output link.
`sharpness_vaapi`	VAAPI VPP for sharpness
`shear`	Shear transform the input image.
`showcqt`	Convert input audio to a CQT (Constant/Clamped Q Transform) spectrum video output.
`showcwt`	Convert input audio to a CWT (Continuous Wavelet Transform) spectrum video output.
`showfreqs`	Convert input audio to a frequencies video output.
`showinfo`	Show textual information for each video frame.
`showpalette`	Display frame palette.
`showspatial`	Convert input audio to a spatial video output.
`showspectrum`	Convert input audio to a spectrum video output.
`showspectrumpic`	Convert input audio to a spectrum video output single picture.
`showvolume`	Convert input audio volume to video output.
`showwaves`	Convert input audio to a video output.
`showwavespic`	Convert input audio to a video output single picture.
`shuffleframes`	Shuffle video frames.
`shufflepixels`	Shuffle video pixels.
`shuffleplanes`	Shuffle video planes.
`sidechaincompress`	Sidechain compressor.
`sidechaingate`	Audio sidechain gate.
`sidedata`	Manipulate video frame side data.
`sierpinski`	Render a Sierpinski fractal.
`signalstats`	Generate statistics from video analysis.
`signature`	Calculate the MPEG-7 video signature
`silencedetect`	Detect silence.
`silenceremove`	Remove silence.
`sinc`	Generate a sinc kaiser-windowed low-pass, high-pass, band-pass, or band-reject FIR coefficients.
`sine`	Generate sine wave audio signal.
`siti`	Calculate spatial information (SI) and temporal information (TI).
`smartblur`	Blur the input video without impacting the outlines.
`smptebars`	Generate SMPTE color bars.
`smptehdbars`	Generate SMPTE HD color bars.
`sobel`	Apply sobel operator.
`sobel_opencl`	Apply sobel operator
`sofalizer`	SOFAlizer (Spatially Oriented Format for Acoustics).
`spectrumsynth`	Convert input spectrum videos to audio output.
`speechnorm`	Speech Normalizer.
`split`	Pass on the input to N video outputs.
`spp`	Apply a simple post processing filter.
`sr`	Apply DNN-based image super resolution to the input.
`ssim`	Calculate the SSIM between two video streams.
`ssim360`	Calculate the SSIM between two 360 video streams.
`stereo3d`	Convert video stereoscopic 3D view.
`stereotools`	Apply various stereo tools.
`stereowiden`	Apply stereo widening effect.
`streamselect`	Select video streams
`subtitles`	Render text subtitles onto input video using the libass library.
`super2xsai`	Scale the input by 2x using the Super2xSaI pixel art algorithm.
`superequalizer`	Apply 18 band equalization filter.
`surround`	Apply audio surround upmix filter.
`swaprect`	Swap 2 rectangular objects in video.
`swapuv`	Swap U and V components.
`tblend`	Blend successive frames.
`telecine`	Apply a telecine pattern.
`testsrc`	Generate test pattern.
`testsrc2`	Generate another test pattern.
`thistogram`	Compute and draw a temporal histogram.
`threshold`	VVVV->V Threshold first video stream using other video streams.
`thumbnail`	Select the most representative frame in a given sequence of consecutive frames.
`thumbnail_cuda`	Select the most representative frame in a given sequence of consecutive frames.
`tile`	Tile several successive frames together.
`tiltandshift`	Generate a tilt-and-shift'd video.
`tiltshelf`	Apply a tilt shelf filter.
`tinterlace`	Perform temporal field interlacing.
`tlut2`	Compute and apply a lookup table from two successive frames.
`tmedian`	Pick median pixels from successive frames.
`tmidequalizer`	Apply Temporal Midway Equalization.
`tmix`	Mix successive video frames.
`tonemap`	Conversion to/from different dynamic ranges.
`tonemap_opencl`	Perform HDR to SDR conversion with tonemapping.
`tonemap_vaapi`	VAAPI VPP for tone-mapping
`tpad`	Temporarily pad video frames.
`transpose`	Transpose input video.
`transpose_opencl`	Transpose input video
`transpose_vaapi`	VAAPI VPP for transpose
`transpose_vulkan`	Transpose Vulkan Filter
`treble`	Boost or cut upper frequencies.
`tremolo`	Apply tremolo effect.
`trim`	Pick one continuous section from the input, drop the rest.
`unpremultiply`	UnPreMultiply first stream with first plane of second stream.
`unsharp`	Sharpen or blur the input video.
`unsharp_opencl`	Apply unsharp mask to input video
`untile`	Untile a frame into a sequence of frames.
`uspp`	Apply Ultra Simple / Slow Post-processing filter.
`v360`	Convert 360 projection of video.
`vaguedenoiser`	Apply a Wavelet based Denoiser.
`varblur`	Apply Variable Blur filter.
`vectorscope`	Video vectorscope.
`vflip`	Flip the input video vertically.
`vflip_vulkan`	Vertically flip the input video in Vulkan
`vfrdet`	Variable frame rate detect filter.
`vibrance`	Boost or alter saturation.
`vibrato`	Apply vibrato effect.
`vidstabdetect`	Extract relative transformations, pass 1 of 2 for stabilization (see vidstabtransform for pass 2).
`vidstabtransform`	Transform the frames, pass 2 of 2 for stabilization (see vidstabdetect for pass 1).
`vif`	Calculate the VIF between two video streams.
`vignette`	Make or reverse a vignette effect.
`virtualbass`	Audio Virtual Bass.
`vmafmotion`	Calculate the VMAF Motion score.
`volume`	Change input volume.
`volumedetect`	Detect audio volume.
`vpp_qsv`	Quick Sync Video VPP.
`vstack`	Stack video inputs vertically.
`vstack_qsv`	"Quick Sync Video" vstack
`vstack_vaapi`	"VA-API" vstack
`w3fdif`	Apply Martin Weston three field deinterlace.
`waveform`	Video waveform monitor.
`weave`	Weave input video fields into frames.
`xbr`	Scale the input using xBR algorithm.
`xcorrelate`	Cross-correlate first video stream with second video stream.
`xfade`	Cross fade one video with another video.
`xfade_opencl`	Cross fade one video with another video.
`xfade_vulkan`	Cross fade one video with another video.
`xmedian`	Pick median pixels from several video inputs.
`xstack`	Stack video inputs into custom layout.
`xstack_qsv`	"Quick Sync Video" xstack
`xstack_vaapi`	"VA-API" xstack
`yadif`	Deinterlace the input image.
`yadif_cuda`	Deinterlace CUDA frames
`yaepblur`	Yet another edge preserving blur filter.
`yuvtestsrc`	Generate YUV test pattern.
`zmq`	Receive commands through ZMQ and broker them to filters.
`zoneplate`	Generate zone-plate.
`zoompan`	Apply Zoom & Pan effect.
`zscale`	Apply resizing, colorspace and bit depth conversion.